Unrecognized search engines added w/o my consent

Under “Other Search Engines” there are two listed that I would like additional information about before deleting. The first is “https://duckduckgo.com/?q=%s&atb=v271-7__” which is different than the default url of “https://duckduckgo.com/?q=%s&t=brave”, and the second is one I never heard of called “Radar by QratarLabs” with the search url of “https://radar.qrator.net/search?query=%s”. Has anyone else had these appear or know anything about them?
Also, with the url’s for Google, Bing, and Startpage search engines greyed out (which prevents the complete url from being viewed or edited), how can we tell if it is correct or is being redirected to a alternative site?

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